title: When best evidence is rarer than the disease.
authors.affiliation: Olympia Anesthesia Associates, Olympia, WA, USA, gallen57@yahoo.com.
authors.forename: Gregory C
authors.initials: GC
authors.lastname: Allen
mesh_terms: D055317:Evidence-Based Practice / Q000379:methods*; D006801:Humans; D035583:Rare Diseases / Q000628:therapy*; D012196:Review Literature as Topic